Friction-clutch for pulleys.



No. 792,604. PATENTED JUNE 20, 1905. W. D. MASSENGILL.

FRICTION CLUTCH FOR PULLEYS. APPLICATION FILED APR. 12. 1904.

2 SHEETS -SHEET l.

PATENTED JUNE 20. 1905.

W. D. MASSENGILL. FRICTION CLUTCH FOR PULLEYS.

APPLIOA'IION FILED APR. 12. 1904.

2 SHEETS-SHEET 2.

UNITED STATES Patented June 20, 190E.

ATENT OFFICE.

FRICTION-CLUTCH FOR PULLEYS.

SPECIFICATION forming part of Letters Patent No. 792,60k, dated June 20,1905.

Application filed April 12, 1904. Serial No. 202,808.

To all whom, it may concern:

Be it known that I, \VILLIAM DOUGLAS MAS- SENGILL, a citizen of theUnited States, residing at Mercer, in the county of Madison and State ofTennessee, have invented certain new and useful Improvements inFriction-Clutches for Pulleys, of which the following is aspecification, reference being had therein tothe accompanying drawings.

My invention relates to improvements in friction-clutches for pulleys,and has for its object the providing of a clutch of the characterdescribed that shall be simple and effective in construction andoperation and by the use of which much saving of time and wear and tearon belts can be effected, inasmuch as the use of my device obviates thenecessity of slowing up or stopping the engine when it becomes necessaryto put on belts.

A further object of my invention is to provide a device of the characterdescribed that will result in the work of shifting or changing beltsbeing reduced to a minimum and one that shall be simple and easy ofoperation.

The invention consists in the novel construction, combination, andarrangement of the several parts hereinafter fully described,illustrated, and finally claimed.

In the drawings accompanying this specification and made a part hereof lhave illustrated a preferred embodiment of my invention, and while it isobvious that certain modifications of form and arrangement of parts willsuggest themselves to the skilled operator and mechanic suchmodifications come well within the spirit and scope of my invention asdisclosed and claimed, and I do'not, therefore, desire to be limited tothe precise construction and arrangement shown.

In the drawings, Figure 1 is a front elevation with pulley broken away.Fig. 2 is a longitudinal section through the entire apparatus. Fig. 3 isa section on line 3 3 of Fig. 1. Fig. 4 is a perspective section of thepulley. Fig. 5 is an end view of collar and lever 9. Fig. 6 is aperspective sectional view of the paper-friction shown in parts. Fig. 7is a perspective view of the collar 10. Fig. 8 is a section of the maincasting.

Like numerals of reference designate similar parts in all the figures ofthe drawings.

1 designates the shaft, upon which the main casting 2 is suitablyjournaled in bearings. This casting is arranged inside of the pulley 3and is held in place by means of bolts passing through the holes 4 inthe partitions 5, the bolts serving to hold the said partitions firmlyagainst the flattened projection or lug 6 on the casting. Near one endof the casting 2 and rigidly mounted on the shaft 1 is a coneshapedpaper-friction-hub arrangement 7 and secured to the other end of thecasting is a forked lever 8, having its outer end pivoted on ayoke-lever 9, which is mounted on a collar 10, mounted on the shaft 1.Fig.8 shows clearly the construction of the main casting. This castingis preferably formed intwo parts and is provided with a brass bearing 11and with projections 12, having holes 13 therethrough for the receptionof bolts or other suitable means for fastening the parts together. Oneend of this casting is coneshaped, as shown at M, and engages with thepaper-friction apparatus 7, and on the other end is formed a collar 15,arranged to receive the two curved pieces 16, which are pivoted, asshown at 17, on the forks of the lever 8. The other end of this lever ispivoted in the fork 18 on the lever 9. Pivoted in the yoke of the lever9. as shown at 19, are two curved pieces 20, which bear in collar 10.This collar is preferably formed in two parts 21 and 22, which areconnected by bolts passing through the holes 23. In order to securelyfasten the collar 10 to the shaft, a set-screw 24 is provided, whichacts on the case-hardened pin 25 and rigidly secures said collar to theshaft.

In Fig. 6 the several parts comprising the paper-friction-hub apparatusare shown. On the shaft 1 a collar 26 is mounted. This collar isprovided with a flange 27 against which rests the end 28 of thecone-shaped paperfriction 29. Secured to the smaller end 30 is the endpiece 31, all of the parts being held in place by bolts 32, which passthrough the holes 33 shown appearing in each part.

In operation the lever 9 is pushed to one side, causing the lever 8 tomove the entire pulley and casting until the cone-shaped end 14 engageswith the paper-friction hub or apparatus 7, which causes the pulley torotate on the shaft 1. To throw the pulley out of action, the lever 9 ispushed in the opposite direction, causing the lever 8 to throw thecasting out of contact with the friction-hub 7.

Having thus described my said invention, what I claim as new, and desireto secure by Letters Patent of the United States, is

1. In a friction-clutch, acone-shaped sleeve, a pulley-wheel mounted onthe sleeve, a collar on the sleeve, a forked link, curved pieces pivotedwithin the forks and arranged to ride on the collar, a separate collar,a yoke-lever, curved pieces pivoted within the yoke and arranged to ridethe separate collar, means for pivotally connecting the lever and theforked link, and a cone-shaped friction-hub comprised of three pieces,substantially as described.

2. In a cone friction-clutch, a sleeve having a cone-shaped end, and acollar, a separate collar, a lever having a yoke, curved pieces fittingwithin the yoke and arranged to fit and ride on the collar, and a forkedlink connecting the lever with the collar on the end of the sleeve, anda cone-shaped friction-hub formed in three pieces, substantially asdescribed.

3. In a friction-clutch, a casting formed in two pieces and having acone-shaped end, a pulley-wheel mounted on the casting, means forconnecting the two pieces of the casting, a collar on the end of thecasting, a collar separate from the casting, a forked lever havingcurved pieces pivoted on the forks and arranged to fit the separatecollar, a link forked at one end and having curved pieces pivoted on theforks and fitting on the collar on the end of the casting, said linkhaving the other end pivoted on the lever, and a cone-shapedfriction-hub formed in three pieces, substantially as described.

4. In a friction-clutch, the combination of a casting formed in twopieces and having a cone-shaped end, means for connecting the two piecesof the casting, a collar on the end of the casting, a separate collar, ayoked lever, two curved pieces arranged to fit the separate collar andride thereon, means for pivoting the two curved pieces to the yokedlever, a forked lever pivoted at one end on the lever, and two curvedpieces arranged to lit and ride on the collar on the end of the castingand having the forks of the lever pivoted thereon, substantially asdescribed.

In testimony whereof I hereunto aflix my signature in presence of twowitnesses.

WILLIAM DOUGLAS HASSENGILL.

Witnesses:

T. E. MERCER, M. J. SILIGR.

